[OPENMP50]Add support for relaxed clause in atomic directive.

Added full support for relaxed clause.
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index b303851..14ddc13 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -524,6 +524,8 @@
 
 void OMPClauseProfiler::VisitOMPReleaseClause(const OMPReleaseClause *) {}
 
+void OMPClauseProfiler::VisitOMPRelaxedClause(const OMPRelaxedClause *) {}
+
 void OMPClauseProfiler::VisitOMPThreadsClause(const OMPThreadsClause *) {}
 
 void OMPClauseProfiler::VisitOMPSIMDClause(const OMPSIMDClause *) {}